<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>五彩导航</title>
    <style>
        .nav a {
            display: inline-block;
            text-decoration: none;
            color: blueviolet;
            text-align: center;
            line-height: 58px;
            width: 120px;
            height: 58px;
            background-color: turquoise;
            background: url(images/yun.png) no-repeat;
        }
        .nav a:hover{
            background-image: url(images/yun.jpg);
        }
        /* .one {
           
        }
        .two {
            
        }
        .three {
           
        }
        .four {
           
        } */
    </style>
</head>
<body>
 <div class="nav">
    <a class="one" href="#">五彩导航</a>
    <a class="two" href="#">五彩导航</a>
    <a class="three" href="#">五彩导航</a>
    <a class="four" href="#">五彩导航</a>
 </div>
</body>
</html>